Issue 18, 2014

Study on the enhanced and stable field emission behavior of a novel electrosprayed Al-doped ZnO bilayer film

Abstract

A novel electrosprayed bilayer film composed of an over-layer (L2) of aluminium-doped ZnO (AZO) nanoflakes (NF-AZO) and a under-layer (L1) of AZO nanocrystallites structure (NC-AZO) named BL:NF/NC-AZO is studied as an excellent field-emitter. The XRD pattern demonstrated that the doped bilayer film has preferential growth along the c-axis with hexagonal wurtzite structure and the (0 0 2) peak shifted toward the larger angle side after doping. The lowest turn-on field of ∼2.8 V μm−1, highest emission current density of 1.95 mA cm−2 is obtained for BL:NF/NC-AZO under the field of 6.8 V μm−1 and as well as the highest field enhancement factor (β) is estimated to be 4370 ± 3, compared to pure ZnO bilayer film (BL:NF/NC-ZnO) and also better than NC-AZO film and possesses the excellent long term stability of emission current. The PL intensity of doped ZnO bilayer film is very much stronger than pure ZnO bilayer structure. The superior field emission properties are attributed to the better morphologies, Al-doping and better crystallinity of bilayer AZO films.

Graphical abstract: Study on the enhanced and stable field emission behavior of a novel electrosprayed Al-doped ZnO bilayer film

Article information

Article type
Paper
Submitted
04 Nov 2013
Accepted
21 Jan 2014
First published
28 Jan 2014

RSC Adv., 2014,4, 9072-9077

Study on the enhanced and stable field emission behavior of a novel electrosprayed Al-doped ZnO bilayer film

K. Mahmood, R. Munir, B. S. Swain, G. Han, B. Kim and H. S. Jung, RSC Adv., 2014, 4, 9072 DOI: 10.1039/C3RA46394J

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